Grinding-machine.



M. WAGNER.

GRINDING MACHINE.

APPLICATION men mmza, I912.

1 214,098. Patented Jan. 30,1917.

I. i k

WITNESSES INVENTOR m: NORRIS PETERS co.. Imam-ma. WASNINIJIUN. n, c.

MICHAEL \IVAGN'EE, F PITTSBURGH,

ion.

PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- A CORPORATION OF PENNSYLVANIA.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented J an. 30, 191?.

Application filed March 26, 1912. Serial No. 686,413.

To all whom it may concern:

Be it known that I, MICHAEL YVAGNER, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification.

The invention relates to grinding machines, and particularly to the means for resurfacing the grinding wheel. The invention has for its objects the provision of improved means permitting the proper adjustment of the facing device and its effective manipulation. Certain embodiments of the invention are illustrated in the accompanying drawings, wherein- Fig. 1 is a perspective view of the machine with a wheel facing device adjusted thereon and Fig. 2 is a transverse section on an enlarged scale through the facing device shown applied on Fig. 1.

The device consists of easing 1 which supports the grinding wheel 2, and incloses the gear mechanism which constitutes the driving connection between the operating handle 3. The grinding wheel is made of some form of abrasive material and it is found that constant use in grinding tools wears the grinding surface unevenly and it is therefore necessary to re-surface the wheel to a true grinding surface. For this purpose I employ a surfacing wheel comprising a series of alternately disposed disks 5 and toothed disks 6, mounted upon a shaft 7 where they are free to be rotated by contact with the face of the grinding wheel.

The shaft 7 is carried by a slotted block 8, provided with a knob 8 adapted to be gripped by the finger and is slidably mounted upon the shaft 9, which is supported at each end by the arms 10 on the guide plate 11. At the top of the guide plate 11 is a V shaped guide 12 which engages the end of the block 8 and serves to prevent the rotation of the block 8 about the shaft 9, and also affords an additional bearing support for the block 8 to slide from one end of the shaft 9 to the other in a path parallel to the axis of the grinding wheel.

The guide plate 11, is pivoted at 12 to a bracket 13 which is adjustably mounted in a slot 1% in the casing 1, and is secured in position by means of the set screw 15 engaging the supporting arm 16 of the bracket. By moving the supporting arm 16 in or out of the slot in the casing the facing wheel a is moved toward and away from the face of the grinding wheel, and it is therefore possible to adapt the device to various sizes of wheels.

An additional adjustment of the facing wheel to and from the grinding wheel is afforded by the movement of the guide plate 11 about the pivot rod 12. This adjustment is'controlled by the wing-nut 17 threaded upon the stove bolt 18 which is secured against rotation in bracket 13, Fig. 2, by means of the square head fitting a square socket in the bracket, and projects through a slot 19 in the guide plate 11. Screwing up of the wing-nut 17 causes the guide to swing toward the grinding wheel thereby carrying the facing wheel 1 into engagement with the grinding wheel face. A spring 20 surrounds the bolt 18 and is disposed between the guide plate 11 and the bracket 13, and normally tends to hold the guide plate and facing wheel away from the grinding wheel when not in operation to prevent premature engagement of the facingwheel with the grinding wheel.

When it is desired to face the grinding wheel the bracket carrying the facing device is adjusted to the casing 1 so that the facing wheel nearly touches the face of the wheel when the guide plate 11 is in its position farthest away from the wheel, or when the wing-nut is hacked to the end of the bolt 18. The set screw 15 is then tightened. The grinding wheel is then rotated rapidly and the wing-nut screwed toward the guide plate. The instant the facing wheel 1 engages the grinding wheel the knob 8 is gripped by the finger and the block 8 moved back and forth transversely across the face of the wheel. When the facing wheel no longer cuts the grinding wheel, the wingnut is tightened further, causing the facing wheel to again bite the grinding wheel while the block is moved transversely across the face of the wheel. This operation is repeated until a true surface has been cut on the face of the wheel.

Having thus described my invention and illustrated its use, what claim as n and desire to secure by Letters Patent is the following.

1. In combination in a facing device for grinding wheels, a support pivoted for movement toward and from the grinding.

wheel, yielding means tending to move the support away from the grinding wheel, a transverse guide on the support, a block provided with a facing means mounted on the guide for lateral movement, and positive means for adjusting the support toward the grinding wheel against the resistance of the yielding means.

2. In combination in a facing device for grinding wheels, a pivoted support, yielding means tending to move the support away from the grinding wheel, guide means on the support, a block provided with a facing means mounted on the guide for lateral movement and adjusting meanswhereby the said support can be moved-toward the grindslide laterally on the guide, a facing means carried by the block and means formoving the support against the action of the spring toward the grinding wheel. 7

In testimony .whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses.

MICHAEL IVAGNER.

IVitnesses:

LETITIA A. MYERS, ARCHWORTH MARTIN.

Copies of this patent may be obtaineti for five cents each, by addressing the Commissioner of Patents. Washington, D. Q. 

